Neuron-like cell differentiation of MDSCs. A, neuron-like cells morphology and identification of MDSCs by immunofluorescent labeling; a1, a2, a3 and a4, phase contrast; b1, b2, b3 and b4, NSE+, NF+, NSE-, NF-; c1, c2, c3 and c4, merge (bar=25μm). B (1), marker; 2, GAPDH; 3, NSE+; 4, NSE- (MDSCs); 5, NF+; 6, NF- (MDSCs).